mShan0

Results 4 issues of mShan0

Continues the refactor of parsers based on #1448. Refactors the following token parsers: - `LoginAck` - `Order` - `ReturnStatus` - `Info` and `Error` - `metadataParse` portion of `ColumnMetadata` Buffer read...

Would it be a good idea to create a new stream parser-style class to handle these parsers? Planning to move the parser position reset upon retry into metadataParse.

Adds the following parsers: ``` FloatLE FloatBE DoubleLE DoubleBE UInt24LE ``` Adds tests for these parsers: ``` UsVarchar BVarbyte ```